Impulse coal-washing machine.



R. HAMILTON.

IMPULSE COAL WASHING MACHINE.

APPLICATION FILED IuNE II. I9I5.

1,169,806. Patented Feb. 1, 1916.

THE COLUMBIA pLANoGRAPI-I co.. WSHINGTON, n. c.

narran sratrns rafrnnfr ormoni.

ROBERTv-AMILTON, OF BIRMINGHAM, ALABAMA.

IIVIPLSE COAL-TASHING MACHINE.

.Application filed June 11, 1915.

To all liti/tom t may concern:

Be it known that l, Ronnr HAMILTON, a citizen of the United States, residing at Birmingham, in the county of Jederson, State of Alabama, have invented certain new and useful improvements in Impulse Coal-'Washing Machines, of which the following is a speciiication.

My invention relates to apparatus for use in connection with coal washing machines and particularly refers to a novel valve and valve seat for producing a rapid alternation in water pressure acting upon a jig of usual construction.

ln such an apparatus it is necessary that mechanism should be provided for producing rapid changes in the flow of water acting upon such apparatus and that said mechanism should be simple to operate and economical to manufacture.

The valve mechanism of my invention is simple, the changing of the flow of water being accomplished by a single moving part.

It will be understood, of course, that the object in a device of this sort is to separate the impurities, such as slate, etc., from the coal, and that these impurities are of a greater specific gravity than the coal. The separating action is secured by rapidly vibrating or jigging the coal carried on the screen, the heavier particles assuming a position corresponding to their specific gravity, the coal, therefore, remaining on the top of the heap of material. 1t is usual to cover the screen with a heavy substance, such as feldspar, this material being of a size greater than that of the openings through the screen, although, of course, it will be understood that the device is operable without the addition of this material.

The objects and utility of my invention will be more readily understood by reference to thc drawings, wherein- Figure 1 is a side view of a jig showing the preferred form of valve, a portion of a side of the jig being cut away; Fig. 2 is a sectional view on the line a-b of Fig. 1 showing my oscillating valve and its seat; Fig. 3 is a perspective view of the hollow cylindrical valve, and Fig. 4 is a perspective view of the valve seat.

10 is a washing jig having therein a perforated plate 11 on which the coal tobe washed is placed. Below said plate 11 is secured the valve seat 12, said seat being semicircular in cross section.

Specification of 'Letters Patent.

Patented Feb. 1, 1916.

Serial No. 33,448.

Below the seat 12 is a cylindrical valve 13 having in part of its surface a series of longitudinal slots 14.

Provided in valve seat 12 are slots 15, corresponding in length and width and adapted to registerwith slots 14 in valve 13.

llfater main 16 discharges through valve 17 into the T 18 mounted exteriorly of the jig 10. A hollow spindle 19, mounted in suitable stuihng boxes 20 and 21, extends from the T member 1S into 10 and is rigidly fastened to the end 22 of valve 13. An arm 28 is secured to spindle 19, to which is attached means (not shown) for imparting oscillatory motion thereto. The mechanism producing the oscillatory motion of spindle and valve may be regulated to make the opening and closing of the slots in valve seat 12 at regular intervals and for any desired length of time. Water received through main 1G possesses considerable head, so when it is admitted through oscillating valve 13 and seat 12 it creates impulses in the water above seat 12, thus forcing the water through the perforated screen 11, thereby lifting the pure coal to the top of the jig and causing it to pass out through trough 24. Trough 24 leads to a bin (not shown) where the washed coal is stored. rThe refuse in the coal drops to the bottom of the jig 10 and is withdrawn through valve 25.

The slots or ports 14 and 15 in the valve and seat respectively are so arrranged that a uniform upward pressure is exerted through the perforated plate 11, thus securing the greatest possible efficiency.

Attached to T member 18 is an air chamber 26 to prevent the water from hammering and to equalize somewhat the pressure beneath valve 13.

l claim:

1. In a device of the class described, the combination of a semi-cylindrical valve seat provided with apertures or ports, a hollow cylindrical valve provided with ports adapted to register with the ports in said seat in one position. a hollow spindle rigidly connected to said valve, means for oscillating Y pressure equalizer, a valve in the pressure valve adapted for oscillation Whereby the line, said valve being,` provided with means passages through the ports of the Valve and for periodically interrupting the flow of valve seat are alternately opened and closed, Water through the valve seat, said valve substantially as described.

a being hollow and of cylindrical shape and Signed at Birmingham, Ala., this 5th day 15 provided with slotted ports in its body, a of June, 1915.

valve seat, semi-Cylindrical in shape and ROBERT HAMILTON. provided with slotted ports with which the Witnesses: ports in said valve are adapted to register E. D. LEAVEY,

l0 in one position of said Valve, an arm on said VM. RICHARDSON, J r.

Copies of this patent may be obtained for ve cents each, by addressing che Commissioner of Yatencs Washington, D. C. 

